no answer and no message left = SPAMMER / SCAMMER

Here's the guy who's behind this: Mark Stephen Thompson call him at this number and give him hell! 231-944-4733

CNC Jobs, LLC

13854 Lakeside Circle

Suite 244

Sterling Heights, MI 48313

I called it back and it was a recording that asked me if I wanted a way to generate thousands of dollars....

+1 (231) 354-2773
Got a call from this number. A recording came on an said im being sued by irs.  I figure if it was that important they would leave a message by human not machine

If it was the IRS, they would send you letters by first class mail.  Several of them.  Then they would send certified letters that you needed to sign for.  Ignore those and the next thing they do is freeze your bank accounts.  They do not call.

Official IRS Government site detailing this scam and providing links to report it:
http://www.irs.gov/uac/Newsroom/IRS-Warns-of-Pervasive-Telephone-Scam